Controller.



E. W. STULL. CONTROLLER.

APPLIOATION IILBD FEB. 15, 1903.

900,612, v Patented 0015.6,1908.

2 SHEETS-SHEET 1.

34 &

rm: NaRRls PETERS ca WASHINGTON, n. c.

.UNITED STATES PATENT OFFICE.

EMMETT W. STIILL, OF NORWOOD, OHIO, ASSIGNOR TO ALLIS-OHALMERS COMPANY,A CORPORATION OF NEW JERSEY.

CONTROLLER.

In my prior patent a controller is de-- scribed in which there are twoseries-parallel controlling drums arranged to operate together and eachcontrolling a resistance and a plurality of motors, a combinedseries-parallel and cut-out switch for connecting the two drums and withtheir respective motors either in series or in parallel relation and tocut out either one of said drums and its associated motors, and areversing switch. The

two series-parallel controlling drums, the combined series-parallel andcut-out drum, and the reversing drum are properly interlocked. But it isfound that when the two drums and their associated motors are connectedin series the resistances associated with the two drums are of too greatvalue although perfectly proportionate when the drums are connected inparallel.

It is the object of my present invention to improve upon theconstruction and arrangement shown and described in my prior patent.This is done by providing means on the combined series-parallel andcut-out drum for cutting out part of the resistance associated with theseries-parallel and resistance drums when the two series-parallel andresistance drums and their associated groups of motors are in series. Inaddition, the reversing drum and the series-parallel and cut-out drumare in vertical alinement with each other and behind and midway betweenthe two series-parallel and resistance drums, thus making thecontrolleras a whole of small size.

The various novel features of my invention will appear fromthe'description and drawings and will be particularly pointedout in theclaims.

Figure 1 is a section on the line 11 of Fi 2, showing a controllerconstructed in accordance with my invention; Fig. 2 is a partial frontelevation of such controller, with the Specification of Letters Patent.

Application filed February 15, 1908.

Patented Oct. 6, 1908.

Serial No. 416,005.

casing in section Fig. 3 is a diagram of the electrical connections, thereversing switch and its connections being omitted for simplicity; andFig. 4 is a series of simple diagrams showing the connections forcertain positions of the various controlling drums.

The two controller drums A and B are connected, as by gear wheels 10 and11, to be simultaneously operated in opposite directions by a singlehandle 12. The handle 12 may be arranged as usual so that it can beremoved only when the controller is in off position. The drums A and Bmay be of any esired type, and are here shown as seriesparallel drums,the drum A controlling motors 1 and 2 through series and parallelpositions while the drum B controls the motors 3 and 4 in the same way.These drums have their own variable resistances 13 and 14 re spectively,and their own blow-out coils 15 and 16 respectively. A drum-typereversing switch C is provided as usual and is mounted and interlockedas hereinafter described. The connections of the reversing switch arethe usual ones and are omitted from the diagram of connections (Fig. 3)in order to simplify the latter. A fourth drum-type switch D is alsoprovided, this drum having four 0perative positions, as indicated inFig. 3. In the position marked Series it connects the two drums A and Band their associated motors in series with each other, the drums A and Brespectively controlling the series and parallel connections of themotors 1 and 2, and 3 and 4. When the drum D is in this position theresistance 14 is short-circuited so that the resistance 13 alone givesthe resistance variations for all four of the motors. When the drum D isin the position marked Parallel, the drums A and B with their.associated motors are in parallel with each other, each of the drums Aand B controlling the individual connections of the motors under itscontrol and also controlling the resistance 13 or 14 associated withsuch motors. The two positions of drum D which have just been describedare the inner or middle positions of such drums. In one of the extremepositions, marked A out, the drum A and the motors 1 and 2 controlledthereby are cut out. In the other extreme position, marked B out thedrum B and the motors 3 and 4 controlled thereby are cut out.

The drums O and D are arranged one above the other on the same axis, theshaft 31 of the drum D extending through the sleeve on which the drum 0is mounted and through the top of the controller casing to receive thehandle 32. The sleeve carrying the drum C is connected to the shaft 33by sprocket wheels and chain 34, and the shaft 33 extends through thetop of the controller to receive the handle 35. The up )er end of theshaft of the controller drum is shown as being journaled in a socket inthe lower end of the shaft 33, these two shafts being in alinement. Thehandle 32 is preferably removable when the drum D is 1n any 0 erativeposition, while the handle 35 can e removed only when the reversingswitch C is in off position.

The drum C is interlocked with the drum A by means of a disk 17, notchplate 18 on shaft 33, and swinging lever 19 loosely pivoted on shaft 31,thus being movable only when the drum A is in off position. The drum Dis interlocked with the drum A by means of the disk 20, notch plate 21on shaft 31, and swinging lever 22 loosely pivoted on shaft 33, thusalso being movable only when the drum A is in off position. By means ofthese two interlocks the drums C and D can be moved only when theconnections of the motors are broken at the drums A and B. The drum Dthus provides for the connection of the drums A and B in series for slowspeed city traflio and in parallel for high speed interurban traffic,and also provides for the cutting out of either drum and its associatedmotors in case such cutting out should be necessary for any reason. Wheneither drum is cut out it and its motors are entirely disconnected,while the connections of the other drum and its associated motors arenot affected in the slightest. Moreover, the short-circuiting of theresistance 14 when the drum D is in series position gives a betterregulation-of the motors than is ordinarily obtained when thisresistance is not cut out.

Many modifications in the precise arrangement shown and described may bemade without departing from the spirit andscope of my invention, and allsuch I aim to cover in the following claims.

What I claim as new is 1. In combination, a plurality of regulatingswitches, a motor and its regulating resistance under the control ofeach of said switches, and another switch arranged to connect the firstmentioned switches and the motors controlled thereby in series and inmultiple and to cut out the regulating resistance associated with one ofsaid motors when the switches are connected in series.

2. In combination, a plurality of regulating switches, a motor and itsregulating resistance under the control of each of said switches, andanother switch arranged to connect the first mentioned switches and themotors controlled thereby in series and in multiple and to short-circuitall save one of the regulating resistances associated with said motors.

3, In combination, a plurality of drums, each drum being arranged tocontrol one or more motors and a regulating resistance therefor, and aswitch arranged to connect said drums and their associated motors inseries and in arallel and to short-circuit the regulating resistanceassociated with less than all of said drums when said drums areconnected in series.

4. In combination, a plurality of regulating switches connected tooperate together, a motor and its regulating resistance under theindependent control of each of said switches, and another switcharranged to connect said first mentioned switches in series or inparallel, cutting out the resistance associated with one of said firstmentioned switches when the first mentioned switches are in series, andto cut out any one of the first mentioned switches and the motorcontrolled thereby.

5. In combination, a plurality of drums connected to operate together,each of said drums being connected and arranged to independently controlone or more motors by means of a resistance, and a switch arranged tocut out any one of said drums and the motor or motors controlledthereby, to connect said drums with their associated motors either inseries or in parallel, and to render the resistance associated with oneof said drums ineffective when said drums are in series.

6. In combination, a lurality of seriesparallel regulating switc es, aplurality of motors and a regulating resistance therefor under thecontrol of each of said switches, and another switch arranged to connectsaid first mentioned switches with their associ- I cut out theresistance associated with one of said series-parallel switches when thelatter with their associated motors are connected in series.

7. In combination, a lurality of seriesparallel re ulating switc es, aplurality of motors and a regulating resistance therefor under thecontrol of each of said switches, and another switch arranged to connectsaid first mentioned switches and their associated motors in series andin parallel, to out out the resistance associated with one of saidseries-parallel switches when the latter with their associated motorsare connected in series, and to cut out any one of said seriesparallelswitches and its associated motors.

8. In combination, a plurality of regulating switches, a motor and itsregulating resistance under the control of each of said switches, andanother switch arranged to con nect the first mentioned switches and themotors controlled thereby in either series or parallel and to cut outpart of the resistance when said switches and their associated motorsare connected in series, said other switch being also arranged to cutout any of said first mentioned switches.

9. In combination, a plurality of regulating' switches, a motor and itsregulating resistance under the control of each of said switches, andanother switch arranged to connect the first mentioned switches and themotors controlled thereby in either series or parallel and to cut outpart of the resistance when said switches and their associated motorsare connected in series.

10. In combination, a plurality of seriesparallel controlling drums, aplurality of motors under the control of each of said drums and arrangedto be connected in series or parallel thereby, a regulating resistancealso under the control of each of said drums, and a switch arranged toconnect said drums and their associated motors in series and in paralleland to cut out any one of said drums and its associated motors, saidlast named switch being also arranged to cut out part of saidresistances when said drums and their associated motors are connected inseries.

11. In combination, a plurality of seriesparallel controlling drums, aplurality of motors under the control of each of said drums and arrangedto be connected in series or parallel thereby, a regulating resistancealso under the control of each of said drums, and a switch arranged toconnect said drums and their associated motors in series and inparallel, said last named switch being also arranged to cut out part ofsaid resistances when said drums and their associated motors areconnected in series.

12. In a controller, a plurality of motorregulating drums, a switch forconnecting said drums in series or in arallel relation, and a reversingswitch, said ast two switches being arranged in vertical alinement.

13. In a controller, the combination of a plurality of series-parallelcontrolling drums, a drum-type switch for connecting said firstmentioned drums either in series or in parallel, and a drum-typereversing switch, said last two switches being rotatable on the sameaXls.

14. In a controller, the combination of a plurality of series-parallelcontrolling drums, a drum-type switch for connecting said firstmentioned drums either in series or in parallel, a drum-type reversingswitch, said last two switches being rotatable on the same axis, andmeans for operating each of said switches from the top of thecontroller.

15. In a controller, two motor-controlling drums, a drum-type switch forconnecting said first mentioned drums in series or in parallel, and adrum-type reversing switch, the last two switches being arranged withtheir shafts in alinemen't.

16. In a controller, two motor controlling drums, a drum-type switch forconnecting said first mentioned drums in series or in arallel, adrum-type reversing switch, the ast two switches being arranged withtheir shafts in alinement, and means for operating all of said drumsfrom the top of the controller.

In testimony whereof I affiX my signature, in the presence of twowitnesses.

EMMETT W. STULL.

Witnesses:

GEO. B. SoHLEY, FRED J. KINsEY.

